2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)最新文献_第9页

Load-Balancing Techniques for 5G Millimeter-Wave Distributed Antenna System 5G毫米波分布式天线系统负载均衡技术

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448953

Teppei Oyama, Takashi Seyama

引用次数: 4

Passive Beamforming Design for Reconfigurable Intelligent Surface-aided OFDM: A Fractional Programming Based Approach 可重构智能表面辅助OFDM的无源波束形成设计:一种基于分数规划的方法

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9449003

Keming Feng, Yijian Chen, Yu Han, Xiao Li, Shi Jin

{"title":"Passive Beamforming Design for Reconfigurable Intelligent Surface-aided OFDM: A Fractional Programming Based Approach","authors":"Keming Feng, Yijian Chen, Yu Han, Xiao Li, Shi Jin","doi":"10.1109/VTC2021-Spring51267.2021.9449003","DOIUrl":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9449003","url":null,"abstract":"Reconfigurable intelligent surface (RIS) is a low-cost device envisioned to achieve substantial promotion in both spectrum and energy efficiency in the future wireless communication systems. In this paper, we investigate the downlink transmission of the RIS-enabled orthogonal frequency division multiplexing (OFDM) system, and propose a low-complexity passive beamforming optimization algorithm to maximize the achievable sum-rate over all subcarriers. The passive beam-forming optimization is a NP-hard problem due to the RIS-induced non-convex unit modulus constraints. We conquer this difficulty by exploiting a fractional programming (FP) based approach combined with an efficient manifold optimization (MO) method. With the proposed low-complexity passive beamforming optimization algorithms and water-filling power allocation, the achievable sum rate can then be maximized through alternating optimization (AO). Simulation results indicate that the proposed AO based algorithm performs well in achieving high average sum-rate with a fast convergence rate.","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133956127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A 2D Non-Stationary Channel Model for Underwater Acoustic Communication Systems 水声通信系统的二维非平稳信道模型

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448976

Xiuming Zhu, Chengxiang Wang, Ruofei Ma

引用次数: 6

MmWave Massive MIMO Hybrid Precoding Prediction in High Mobility Scenarios 高移动场景下的毫米波大规模MIMO混合预编码预测

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448960

Yipai Yan, Honglin Zhao, Jiayan Zhang, Chengzhao Shan, Yongkui Ma

{"title":"MmWave Massive MIMO Hybrid Precoding Prediction in High Mobility Scenarios","authors":"Yipai Yan, Honglin Zhao, Jiayan Zhang, Chengzhao Shan, Yongkui Ma","doi":"10.1109/VTC2021-Spring51267.2021.9448960","DOIUrl":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9448960","url":null,"abstract":"Aircraft-assisted wireless communications have been extensively used in the military and civil fields. With the increasing applications for high data rate aircraft-assisted services such as virtual reality, ultra-high definition transmission video, there is an explosive demand for data rate in high mobility air-to-air (A2A) communication. There exist some promising solutions for high data rate wireless communications, including millimeter wave (mmWave) communications and massive MIMO hybrid precoding. However, most of previous works consider time invariant channel, and assume perfect channel state information (CSI), which is unsatisfactory in high mobility system. And a novel hybrid precoding strategy under high mobility scenarios is designed in this paper. First, some preliminaries about mmWave massive MIMO fast time-varying channel model is given. Then location-aided analog precoder and combiner are designed, and time-varying digital precoder based on matrix series approximation is also proposed. Moreover, the performance loss is analyzed through average effective channel power loss. Simulation results manifest that compared with the conventional strategy, the proposed strategy effectively improves the spectral efficiency in high mobility scenarios.","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124469072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Experimental evaluation of a traffic warning system based on accurate driver condition assessment and 5G connectivity 基于准确驾驶状态评估和5G连接的交通预警系统实验评估

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448881

O. Apilo, Jarno Pinola, Riikka Ahola, J. Kemppainen, Jukka Happonen

{"title":"Experimental evaluation of a traffic warning system based on accurate driver condition assessment and 5G connectivity","authors":"O. Apilo, Jarno Pinola, Riikka Ahola, J. Kemppainen, Jukka Happonen","doi":"10.1109/VTC2021-Spring51267.2021.9448881","DOIUrl":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9448881","url":null,"abstract":"Reliable detection and sharing of information about fatigued or otherwise impaired drivers can provide valuable extra information to improve cooperative road traffic safety services. With such information, connected manually driven or automated vehicles in the area can proactively take precautions and prepare for possible risks caused by a fatigued drivers. In order to provide accurate assessment of the driver condition and efficient distribution for the related warnings, the proposed human tachograph service concept combines ubiquitous wearables-based driver monitoring with 5G connectivity. The combination of the real-time driver biosignals measured while driving and the historical data related to driver’s sleep and physical activity outside the vehicle enables the driver condition to be assessed more accurately than with currently used on-board systems. Based on the driver condition analysis, the 5G-based traffic warning system triggers warning messages towards other road users. The paper also presents the trial setup used to evaluate the performance of end-to-end service as well as the 5G network on top of which the service is deployed. Based on the results, the initial 5G deployments can already achieve clearly better average latency than LTE-based deployments but the reliability should yet be improved for road safety applications.","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134006561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

UAV-assisted Railway Track Segmentation based on Convolutional Neural Networks 基于卷积神经网络的无人机辅助铁路轨道分割

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448887

A. Mammeri, Abdul Jabbar Siddiqui, Yiheng Zhao

引用次数: 4

A Proxy Signature-Based Drone Authentication in 5G D2D Networks 5G D2D网络中基于代理签名的无人机认证

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448962

Mai A. Abdel-Malek, K. Akkaya, Arupjyoti Bhuyan, A. Ibrahim

{"title":"A Proxy Signature-Based Drone Authentication in 5G D2D Networks","authors":"Mai A. Abdel-Malek, K. Akkaya, Arupjyoti Bhuyan, A. Ibrahim","doi":"10.1109/VTC2021-Spring51267.2021.9448962","DOIUrl":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9448962","url":null,"abstract":"5G is the beginning of a new era in cellular communication, bringing up a highly connected network with the incorporation of the Internet of Things (IoT). To flexibly operate all the IoT devices over a cellular network, Device-to-Device (D2D) communication standard was developed. However, IoT devices such as drones utilizing 5G D2D services could be a perfect target for malicious attacks as they pose several safety threats if they are compromised. Furthermore, there will be heavy traffic with an increased number of IoT devices connected to the 5G core. Therefore, we propose a lightweight, fast, and reliable authentication mechanism compatible with the 5G D2D ProSe standard mechanisms. Specifically, we propose a distributed authentication with a delegation-based scheme instead of the repeated access to the 5G core network key management functions. Hence, a legitimate drone is authorized by the core network via offering a proxy signature to authenticate itself to other drones. We implemented the proposed protocol in ns-3 that supports 5G D2D-based communication. We also conducted computational calculations on the RaspberryPi3 IoT device to mimic the drone calculation process and delays. The results demonstrate that the proposed protocol is lightweight and reliable.","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132061665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

On the Impact of V2X-based Maneuver Coordination on the Traffic 基于v2x的机动协调对交通的影响研究

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448700

A. Correa, S. Avedisov, M. Sepulcre, A. Sakr, Rafael Molina-Masegosa, O. Altintas, J. Gozálvez

{"title":"On the Impact of V2X-based Maneuver Coordination on the Traffic","authors":"A. Correa, S. Avedisov, M. Sepulcre, A. Sakr, Rafael Molina-Masegosa, O. Altintas, J. Gozálvez","doi":"10.1109/VTC2021-Spring51267.2021.9448700","DOIUrl":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9448700","url":null,"abstract":"Connected and automated vehicles (CAVs) are expected to make use of Vehicle-to-Everything (V2X) communication to exchange sensor and trajectory data. Using this data, CAVs can coordinate their maneuvers for safer and more efficient driving. ETSI and SAE are currently working to define standards for maneuver coordination and cooperative driving. The current approach at ETSI is based on a distributed solution where vehicles use Vehicle-to-Vehicle (V2V) communication to exchange their planned and desired trajectories. This study evaluates the potential benefits of the ETSI Maneuver Coordination Service to improve the traffic speed using a unique simulation tool. To do so, we first evaluate the impact of maneuver coordination on the vehicles involved in a coordination process. We also evaluate the effects of maneuver coordination on the overall traffic compared to scenarios without coordination. Our study shows that maneuver coordination can yield significant benefits to traffic mobility, however these improvements are intimately linked to the surrounding traffic environment and the specifications of the coordinated maneuver. This highlights the need for more detailed studies on the design of maneuver coordination protocols that should consider the vehicular context when executing and configuring the coordination process.","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133377553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Quasi-Quantum PCI optimization in 5G Networks 5G网络中的准量子PCI优化

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9448985

D. Krishnaswamy

引用次数: 0

Enhancing Wi-SUN AMI Network Resilience by using Emergency Gateway with Optimal Placement 优化配置应急网关增强Wi-SUN AMI网络弹性

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) Pub Date : 2021-04-01 DOI: 10.1109/VTC2021-Spring51267.2021.9449024

Amnart Boonkajay, P. Tan, Lee Kee Goh, Syed Naveen Altaf Ahmed, Sumei Sun

引用次数: 1